Spin-exchange collisions in hot vapors create and sustain bipartite entanglement

• URL: http://arxiv.org/abs/2004.11790v2
• Date: Fri, 12 Jun 2020 19:24:15 GMT
• Title: Spin-exchange collisions in hot vapors create and sustain bipartite entanglement
• Authors: K. Mouloudakis and I. K. Kominis
• Abstract summary: We show that spin-exchange collisions in hot alkali vapors naturally produce strong bipartite entanglement. This entanglement is shown to have a lifetime at least as long as the spin-exchange relaxation time. This is a formal theoretical demonstration that a hot and dense atomic vapor can support longlived bipartite and possibly higher-order entanglement.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Spin-exchange collisions in alkali or alkali/noble gas vapors are at the basis of quantum sensing, nucleon structure studies, tests of fundamental symmetries, and medical imaging. We here show that spin-exchange collisions in hot alkali vapors naturally produce strong bipartite entanglement, which we explicitly quantify using the tools of quantum information science. This entanglement is shown to have a lifetime at least as long as the spin-exchange relaxation time, and to directly affect measurable spin noise observables. This is a formal theoretical demonstration that a hot and dense atomic vapor can support longlived bipartite and possibly higher-order entanglement.

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